docs: def get_sampleEdge(self, res, DS=None, resMode='abs', offsetIn=0.):
          """ Sample the polygon edges, with resolution res
  
          Sample each segment of the 2D polygon
          Sampling can be limited to a subdomain defined by DS
          """
          pts, dlr, ind = _comp._Ves_get_sampleEdge(self.Poly, res, DS=DS,
                                                    dLMode=resMode, DIn=offsetIn,
                                                    VIn=self.dgeom['VIn'],
                                                    margin=1.e-9)
          return pts, dlr, ind